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Re: Nautical Almanac 1981 (USCG license training)
From: Stan K
Date: 2016 Dec 18, 13:03 -0500
From: Stan K
Date: 2016 Dec 18, 13:03 -0500
To expand on what Frank said about the "additional corrections" for the planets, 1981 is in the span of years where the Nautical Almanac included a phase correction for Venus. From the Celestial Tools Help:
The planet Venus exhibits phases like the Moon, which can be seen with optical aid. From 1952 to 1984 the additional corrections for Venus
listed in the Nautical Almanac allowed for both parallax and phase. The phase correction was required because the tabulated position was for the
planet's center of disk. Before 1952 and since 1985 the tabulated position of Venus is for its center of light, and the phase correction is incorporated
into the tabulated values of GHA and Dec.
Stan
-----Original Message-----
From: Frank Reed <NoReply_FrankReed@fer3.com>
To: slk1000 <slk1000@aol.com>
Sent: Sun, Dec 18, 2016 12:49 pm
Subject: [NavList] Nautical Almanac 1981 (USCG license training)
From: Frank Reed <NoReply_FrankReed@fer3.com>
To: slk1000 <slk1000@aol.com>
Sent: Sun, Dec 18, 2016 12:49 pm
Subject: [NavList] Nautical Almanac 1981 (USCG license training)
For what it's worth, I have created a cleaned-up copy of the Nautical Almanac for 1981 (that is still used for USCG celestial navigation training ...yes, really, they use an almanac from 35 years ago). This pdf has proper pagination for a "right page first" printing when printed double-sided so that the interior pages open to a single date, as they should. It also includes cleaned up refraction pages and moon correction pages including two pages which in the old original scan were part of a separate "inside cover" double-page that caused printing problems and was difficult to read. The star charts have also been replaced with better scans. All data is exactly as in the standard USCG training document including the "additional corrections" for the planets which are correct for 1981.
Frank Reed
ReedNavigation.com
Conanicut Island USA
ReedNavigation.com
Conanicut Island USA
